please help solve these with work shown. 13 is the incorrect answer for a-1.

Consider the following information about three stocks: a-1.If your portfolio is invested 40 percent each in A and B and 20 percent in C, wh. the portfolio expected return? (Do not round intermediate calculations and e your answer as a percent rounded to 2 decimal places, e.g., 32.16.) a- What is the variance? (Do not round intermediate calculations and round 2. your answer to 5 decimal places, e.g., .16161.) a- What is the standard deviation? (Do not round intermediate calculations and ent 3. your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. If the expected T-bill rate is 3.70 percent, what is the expected risk premium on th portfolio? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) c-1. If the expected inflation rate is 3.30 percent, what are the approximate and exact expected real returns on the portfolio? (Do not round intermediate calculations enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) c- What are the approximate and exact expected real risk premiums on the portfolio 2. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.)